Product Specification
PE4232
Product Description
The PE4232 is a is a high-isolation Switch designed for CATV
applications, covering a broad frequency range from near DC
up to 1300 MHz. This single-supply SPST switch offers a
single-pin CMOS control interface with industry leading CTB
performance. It also provides low insertion loss, high isolation
and extremely low bias requirements while operating on a
single 3-volt supply. In a typical CATV application, the PE4232
provides for a cost effective and manufacturable solution vs.
mechanical relays.
The PE4232 is manufactured on Peregrine’s UltraCMOS™
process, a patented variation of silicon-on-insulator (SOI)
technology on a sapphire substrate, offering the performance
of GaAs with the economy and integration of conventional
CMOS.
Figure 1. Functional Diagram
RF1
RF2
SPST CATV UltraCMOS™ Switch
Features
•
Non-reflective 75
Ω
switch
•
Integrated 0.25 watt terminations
•
CTB performance of 100 dBc
•
High isolation: 90 dB at 5 MHz,
53 dB at 1000 MHz
•
Low insertion loss: 0.5 dB at 5 MHz,
0.75 dB at 1000 MHz
•
High input IP2: 80 dBm
•
CMOS/TTL single-pin control
•
Single +3-volt supply operation
•
Extremely low bias: 33
µA
@ 3 V
Figure 2. Package Type
6-lead DFN
75
CMOS
Control
Driver
75
CTRL
Table 1. Electrical Specifications @ +25 °C
(Z
S
= Z
L
= 75
Ω
)
Parameter
Operating Frequency
1
Operating Power
Insertion Loss
Isolation
Return Loss
Input 1 dB Compression
2,4
CTB / CSO
Input IP2
2
Input IP3
2
Video Feedthrough
3
Switching Time
Notes: 1. Device linearity will begin to degrade below 1 MHz.
2. Measured in a 50
Ω
system.
3. Measured with a 1 ns risetime, 0/3 V pulse and 500 MHz bandwidth.
4. Note Absolute Maximum ratings in Table 3.
Document No. 70-0054-03
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©2005 Peregrine Semiconductor Corp. All rights reserved.
Page 1 of 8
2
On / Off
DC – 50 MHz
1000 MHz
DC – 50 MHz
1000 MHz
5 - 1000 MHz
1000 MHz
77 & 110 channels;
PO = 44 dBmV
1000 MHz
1000 MHz
80
50
15
75
50
14
30
0.5
0.75
90
53
20
33
-100
Condition
Minimum
DC
Typical
Maximum
1300
30/24
0.65
1.0
Units
MHz
dBm
dB
dB
dB
dBm
dBc
dBm
dBm
mV
pp
µs
PE4232
Product Specification
Figure 3. Pin Configuration
V
DD
GND
RF1
1
2
3
Exposed
Solder Pad
(bottom side)
Table 4. DC Electrical Specifications
Parameter
Min
2.7
Typ
3.0
33
Max
3.3
40
5
0.3xV
DD
Unit
V
µA
V
V
6
5
4
RF2
GND
V
DD
Power Supply
I
DD
Power Supply Current
(V
DD
= 3V, V
CNTL
= 3V)
Control Voltage High
0.7xV
DD
0
CTRL
Control Voltage Low
Table 5. Control Logic Truth Table
Table 2. Pin Descriptions
Pin
No.
1
2
3
4
5
6
Control Voltage (CTRL)
Description
High
1
Low
Signal Path (RF1 to RF2)
ON
OFF
Pin
Name
V
DD
GND
RF1
CTRL
GND
RF2
Nominal 3 V supply connection.
Ground connection.
2
RF port.
1
CMOS or TTL logic level:
High = RF1 to RF2 signal path
Low = RF1 isolated from RF2
Ground connection.
2
RF port.
1
Notes: 1. CTRL accepts both CMOS and TTL voltage levels.
Electrostatic Discharge (ESD) Precautions
When handling this UltraCMOS™ device, observe
the same precautions that you would use with
other ESD-sensitive devices. Although this device
contains circuitry to protect it from damage due to
ESD, precautions should be taken to avoid
exceeding the rating specified in Table 3.
Latch-Up Avoidance
Unlike conventional CMOS devices, UltraCMOS™
devices are immune to latch-up.
Device Description
The PE4232 high isolation SPST CATV Switch is
designed to support CATV applications such as
premise disconnect of a CATV signal path. This
function is typically performed by bulky and
expensive mechanical switches. The high
isolation characteristics, high compression point,
and integrated 75-ohm terminations make the
PE4232 an ideal, cost effective and
manufacturable product of choice.
The control logic input pin (CTRL) is typically
driven by a 3-volt CMOS logic level signal, and
has a threshold of 50% of V
DD
. For flexibility to
support systems that have 5-volt control logic
drivers, the control logic input has been designed
to handle a 5-volt logic HIGH signal. (A minimal
current will be sourced out of the V
DD
pin when the
control logic input voltage level exceeds V
DD
.)
Document No. 70-0054-03
│
UltraCMOS™ RFIC Solutions
Notes: 1. Both RF pins must be held at 0 V
DC
or require external DC
blocking capacitors
2. The exposed pad must be soldered to the ground plane for
proper switch performance.
Table 3. Absolute Maximum Ratings
Symbol
V
DD
V
I
T
ST
T
OP
P
IN
V
ESD
Parameter/Condition
Power supply voltage
Voltage on CTRL input
Storage temperature
Operating temperature
Input power (50
Ω),
CTRL=1/CTRL=0
ESD voltage
(Human Body Model)
Min
-0.3
-0.3
-65
-40
Max
4.0
5.5
150
85
33/24
200
Unit
V
V
°C
°C
dBm
V
Absolute Maximum Ratings are those values
listed in the above table. Exceeding these values
may cause permanent device damage.
Functional operation should be restricted to the
limits in the DC Electrical Specifications table.
Exposure to absolute maximum ratings for
extended periods may affect device reliability.
©2005 Peregrine Semiconductor Corp. All rights reserved.
Page 2 of 8
PE4232
Product Specification
Typical Performance Data @ 25°C (Unless Otherwise Noted)
(75-ohm impedance except as indicated)
Figure 4.
T = -40 °C to 85 °C
0
Figure 5. Input 1 dB Compression Point & IIP3
(50-ohm system impedance)
60
60
-0.2
-40 C
Insertion Loss (dB)
-0.4
50
IIP3
IP3 (dBm)
50
1dB Compression Point (dBm)
-0.6
40
40
-0.8
85 C
25 C
30
-1
30
1dB Compression
-1.2
0
200
400
600
800
1000
1200
20
0
200
400
600
800
1000
1200
20
Frequency (MHz)
Frequency (MHz)
Figure 6. Isolation
0
-20
Isolation (dB)
-40
-60
-80
-100
0
200
400
600
800
1000
1200
Frequency (MHz)
Document No. 70-0054-03
│
www.psemi.com
©2005 Peregrine Semiconductor Corp. All rights reserved.
Page 3 of 8
PE4232
Product Specification
Typical Performance Data @ 25 °C
(75-ohm impedance)
Figure 7. RF1 Return Loss (Switch = ON)
Figure 8. RF1 Return Loss (Switch = OFF)
0
0
-5
-5
-10
Return Loss (dB)
Return Loss (dB)
0
200
400
600
800
1000
1200
-10
-15
-15
-20
-20
-25
-25
-30
-30
0
200
400
600
800
1000
1200
Frequency (MHz)
Frequency (MHz)
Figure 9. RF2 Return Loss (Switch = ON)
Figure 10. RF2 Return Loss (Switch = OFF)
0
0
-5
-5
-10
-10
Return Loss (dB)
Return Loss (dB)
-15
-15
-20
-20
-25
-25
-30
-30
0
200
400
600
800
1000
1200
-35
0
200
400
600
800
1000
1200
Frequency (MHz)
Frequency (MHz)
©2005 Peregrine Semiconductor Corp. All rights reserved.
Page 4 of 8
Document No. 70-0054-03
│
UltraCMOS™ RFIC Solutions
PE4232
Product Specification
Evaluation Kit
The SPST Switch Evaluation Kit board was
designed to ease customer evaluation of the
PE4232 SPST switch. The RF1 port is connected
through a 75
Ω
transmission line to the top left
BNC connector, J1. The RF2 port is connected
through a 75
Ω
transmission line to the BNC
connector on the top right side of the board, J2. A
through transmission line connects BNC
connectors J3 and J4. This transmission line can
be used to estimate the loss of the PCB over the
environmental conditions being evaluated.
The board is constructed of a two metal layer FR4
material with a total thickness of 0.031”. The
bottom layer provides ground for the RF
transmission lines. The transmission lines were
designed using a coplanar waveguide model with
trace width of 0.021”, trace gaps of 0.030”,
dielectric thickness of 0.028”, metal thickness of
0.0021” and
εR
of 4.3. Note that the predominate
mode for these transmission lines is coplanar
waveguide with a ground plane.
J5 provides a means for controlling DC and digital
inputs to the device. Starting from the lower left
pin, the second pin to the right (J5-3) is connected
to the device V
DD
input. The fourth pin to the right
(J5-7) is connected to the device CTRL input. It is
the responsibility of the customer to determine
proper supply decoupling for their design
application. Removing these components from
the evaluation board has not been shown to
degrade RF performance.
Figure 11. Evaluation Board Layouts
Peregrine Specification 101/0079
Figure 12. Evaluation Board Schematic
Peregrine Specification 102/0081
Document No. 70-0054-03
│
www.psemi.com
©2005 Peregrine Semiconductor Corp. All rights reserved.
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